Wireless Communication System, Wireless Communication Terminal, Base Station and Wireless Communication Method

• US 20090305714A1
• Filed: 09/14/2007
• Published: 12/10/2009
• Est. Priority Date: 09/25/2006
• Status: Abandoned Application

• Current Assignee: Kyocera Corporation
• Original Assignee: Kyocera Corporation
• Inventors: Nakamura, Yasuhiro, Tanigawa, Hironobu, Takamatsu, Nobuaki
• Application Number:
  US12/442,450
• Publication Number:
  US 20090305714A1
• Time in Patent Office: Days
• US Class Current: 455/450
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 76/20 Manipulation of established connections

Abstract

Provided is a wireless communication system in which a plurality of channels are shared and one of the channels is adaptively allocated to a wireless communication terminal by a base station. The wireless communication terminal is provided with a channel requesting unit that requests the base station to allocate an individual control channel when a communication request is received from an upper control unit of its own terminal or the base station, and a state control unit that controls the state of its own terminal so that the state transits to an individual control channel connected state in which control information is transmitted/received by wirelessly connecting the individual control channel allocated from the base station. The base station is provided with a channel allocating unit that allocates one of a plurality of traffic channels as the individual control channel to be exclusively used for the wireless communication terminal in response to the request from the wireless communication terminal.

Claims

1. A wireless communication system in which a plurality of channels are shared and one of the channels is adaptively allocated to a wireless communication terminal by a base station,

the wireless communication terminal including:

a channel requesting unit that requests the base station to allocate an individual control channel when a communication request is received from an upper control unit of its own terminal or the base station; and

a state control unit that controls the state of its own terminal so that the state transits to an individual control channel connected state in which control information is transmitted or received by wirelessly connecting the individual control channel allocated from the base station; and

the base station including;

a channel allocating unit that allocates one of a plurality of traffic channels as the individual control channel to be exclusively used for the wireless communication terminal in response to the request from the wireless communication terminal.

2. The wireless communication system of claim 1, wherein the channel allocating unit has a function that allocates a data communication traffic channel and transmits allocation information of the data communication traffic channel to the wireless communication terminal through the individual control channel, and

the state control unit controls the state of its own terminal so that the state transits to a data communication state in which data communication with the base station is performed by wirelessly connecting a traffic channel indicated by the traffic channel allocation information obtained through the individual control channel when a data communication request is received from the upper control unit of its own terminal or the base station in the individual control channel connected state.

3. The wireless communication system of claim 2, wherein when the data communication with the base station ends in the data communication state, the state control unit controls the state of its own terminal so that the state transits to the individual control channel connected state.

4. The wireless communication system of claim 2, wherein when there is a termination request from the upper control unit of its own terminal or the base station in the data communication state, the state control unit controls the state of its own terminal so that the state transits to a standby state by terminating a wireless connection of the data communication traffic channel and a connection with the base station.

5. The wireless communication system of claim 1, wherein when a predetermined time has elapsed without a data communication request from the upper control unit of its own terminal or the base station in the individual control channel connected state, the state control unit controls the state of its own terminal so that the state transits to a sleep state in which a wireless connection of the individual control channel is terminated while maintaining a connection with the base station.

6. The wireless communication system of claim 1, wherein when there is a termination request from the upper control unit of its own terminal or the base station in the individual control channel connected state, the state control unit controls the state of its own terminal so that the state transits to a standby state by terminating a wireless connection of the individual control channel and a connection with the base station.

7. The wireless communication system of claim 1, wherein when a communication request is received from the upper control unit of its own terminal or the base station in a sleep state or a standby state in which a connection with the base station is not established, the channel requesting unit requests the base station to allocate the individual control channel.

8. A wireless communication terminal for performing communication by sharing a plurality of channels and adaptively allocating one of the channels from a base station, the terminal comprising:

a channel requesting unit that requests the base station to allocate an individual control channel when a communication request is received from an upper control unit of its own terminal or the base station; and

a state control unit that controls the state of its own terminal so that the state transits to an individual control channel connected state in which control information is transmitted/received by wirelessly connecting the individual control channel allocated from the base station.

9. The wireless communication terminal of claim 8, wherein when a data communication request is received from the upper control unit of its own terminal or the base station in the individual control channel connected state, the state control unit controls the state of its own terminal so that the state transits to a data communication state in which data communication with the base station is performed by wirelessly connecting a traffic channel indicated by traffic channel allocation information obtained through the individual control channel.

10. The wireless communication terminal of claim 9, wherein when the data communication with the base station ends in the data communication state, the state control unit controls the state of its own terminal so that the state transits to the individual control channel connected state.

11. The wireless communication terminal of claim 9, wherein when there is a termination request from the upper control unit of its own terminal or the base station in the data communication state, the state control unit controls the state of its own terminal so that the state transits to a standby state by terminating a wireless connection of the data communication traffic channel and a connection with the base station.

12. The wireless communication terminal of claim 8, wherein when a predetermined time has elapsed without a data communication request from the upper control unit of its own terminal or the base station in the individual control channel connected state, the state control unit controls the state of its own terminal so that the state transits to a sleep state in which a wireless connection of the individual control channel is terminated while maintaining a connection with the base station.

13. The wireless communication terminal of claim 8, wherein when there is a termination request from the upper control unit of its own terminal or the base station in the individual control channel connected state, the state control unit controls the state of its own terminal so that the state transits to a standby state by terminating a wireless connection of the individual control channel and a connection with the base station.

14. The wireless communication terminal of claim 8, wherein when a communication request is received from the upper control unit of its own terminal or the base station in a sleep state or a standby state in which a connection with the base station is not established, the channel requesting unit requests the base station to allocate the individual control channel.

15. A base station comprising:

a channel allocating unit that allocates, in response to a request from the wireless communication terminal of claim 8, one of traffic channels as an individual control channel to be exclusively used for the wireless communication terminal.

16. The base station of claim 15, wherein the channel allocating unit has a function that allocates a data communication traffic channel corresponding to the traffic channel as the individual control channel and transmits allocation information of the data communication traffic channel to the wireless communication terminal through the individual control channel.

17. A wireless communication method in which a plurality of channels are shared and one of the channels is adaptively allocated to a wireless communication terminal by a base station, the method comprising:

a first step in which the wireless communication terminal requests the base station to allocate an individual control channel when a communication request is received from an upper control unit of its own terminal or the base station;

a second step in which the base station allocates one of a plurality of traffic channels as the individual control channel to be exclusively used for the wireless communication terminal in response to the request from the wireless communication terminal; and

a third step in which the wireless communication terminal controls the state of its own terminal so that the state transits to an individual control channel connected state in which control information is transmitted/received by wirelessly connecting the individual control channel allocated from the base station.